Avionics – Engine Instruments
Part Number: 90090003-01 NG Indicator
The 90090003-01 NG Indicator is a cockpit-mounted analog instrument that measures gas generator (N1) speed, also referred to as NG or “turbine spool RPM.” It plays a vital role in monitoring turbine engine performance, particularly during startup, climb, and cruise, by displaying real-time N1 RPM data.
Applications:
- Installed in turbine-powered helicopters, such as the Bell 206, Bell 407, and other light- to medium-lift rotorcraft
- Used in EMS, utility, law enforcement, and military applications
- Integrated into engine monitoring clusters alongside MGT, torque, and dual tachometers
PAG Support:
Precision Aviation Group (PAG) provides full life-cycle support for the 90090003-01 NG Indicator, including:
- FAA and EASA-certified repair and overhaul services
- Inventory available for immediate exchange or sale
- 24/7 AOG support for rapid turnaround
- Bench testing and calibration for accuracy and reliability
- Global network of repair stations ensuring efficient logistics and support
PAG helps you keep essential engine instrumentation operational and compliant.
Contact Us for Related Parts: Instrumentation (Typically Installed Together):
- 90090001-02 – MGT (Measured Gas Temperature) Indicator
- 90090002-02 – Torque Indicator
- DL439 / 407-375-008-101 – Dual Tachometer Indicator (N2/NR)
- 117-94053-03 – Triple Tachometer Indicator
- ITT / TIT Indicators – Engine temperature monitoring
- 066-3046-07 – Navigation Indicator
Related Engine Parts: (These components work alongside the NG Indicator to complete the engine performance monitoring suite):
- C3P15D6 – Torque Transducer
- 23081 – Torque Pressure Transmitter
- ZCD-B9A023 – Contactor (starter relay support)
- 200-38200-10 – Engine Temperature Sensor
- 350-38051-0001 – Oil Pressure Transmitter
- 608-10024 – Dual Tachometer
- XM301 – NG/NP speed sensor (depending on aircraft type)
